20431285

素因数分解:

$5^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{937}}^1$

素因数の和:1045

約数の個数: 24

約数和(自身を含む): 28871640

約数和(自身を除く): 8440355

約数列:

[1, 5, 7, 35, 49, 89, 245, 445, 623, 937, 3115, 4361, 4685, 6559, 21805, 32795, 45913, 83393, 229565, 416965, 583751, 2918755, 4086257, 20431285]

約数ペア:

[(1, 20431285), (5, 4086257), (7, 2918755), (35, 583751), (49, 416965), (89, 229565), (245, 83393), (445, 45913), (623, 32795), (937, 21805), (3115, 6559), (4361, 4685)]